Astronomy:NGC 6145

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NGC 6145
NGC 6145 imaged by SDSS
Observation data (J2000 epoch)
ConstellationHercules
Right ascension 16h 25m 02.3795s[1]
Declination+40° 56′ 47.926″[1]
Redshift0.028671±0.0000105[1]
Helio radial velocity8,595±3 km/s[1]
Distance414.8 ± 29.0 Mly (127.17 ± 8.90 Mpc)[1]
Group or clusterAbell 2199
Apparent magnitude (V)14.5g[1]
Characteristics
TypeSb[1]
Size~149,000 ly (45.68 kpc) (estimated)[1]
Apparent size (V)0.98′ × 0.5′[1]
Other designations
HOLM 747A, MCG+07-34-021, PGC 58074[1]

NGC 6145 is a spiral galaxy in the constellation of Hercules. Its velocity with respect to the cosmic microwave background is 8,622±4 km/s, which corresponds to a Hubble distance of 414.8 ± 29.0 Mly (127.17 ± 8.90 Mpc).[1] Additionally, one non-redshift measurement gives a farther distance of 460 Mly (140 Mpc).[2] It was discovered by British astronomer John Herschel on 12 May 1828.[3]

NGC 6145 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4][5]

Galaxy group and cluster

NGC 6145 and NGC 6147 are listed together as Holm 747 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.[6] NGC 6145 is also part of the galaxy cluster known as Abell 2199.[7]

Supernova

One supernova has been observed in NGC 6145:

  • SN 2025qmk (Type II, mag. 19.28) was discovered by The Young Supernova Experiment (YSE) on 6 July 2025.[8]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 6145". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6145. 
  2. ↑ "Distance Results for NGC 6145". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6145. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6145". https://cseligman.com/text/atlas/ngc61.htm#6145. 
  4. ↑ Toba, Y.; Oyabu, S.; Matsuhara, H.; Malkan, M. A.; Gandhi, P.; Nakagawa, T.; Isobe, N.; Shirahata, M. et al. (2014). "Luminosity and Redshift Dependence of the Covering Factor of Active Galactic Nuclei viewed with WISE and Sloan Digital Sky Survey". The Astrophysical Journal 788 (1): 45. doi:10.1088/0004-637X/788/1/45. Bibcode: 2014ApJ...788...45T. 
  5. ↑ "NGC 6145". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6145. 
  6. ↑ Holmberg, Erik (1937). "A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems". Annals of the Observatory of Lund 6: 1. Bibcode: 1937AnLun...6....1H. 
  7. ↑ "ACO 2199". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ACO+2199. 
  8. ↑ "SN 2025qmk". IAU. https://www.wis-tns.org/object/2025qmk. 

Coordinates: Sky map 16h 25m 02.3795s, +40° 56′ 47.926″



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